Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.639, sa.3-4, ss.202-209, 2006 (SCI-Expanded)
A search for a narrow baryonic resonance decaying to Ks0 p or Ks0 over(p, ̄) is carried out in deep inelastic ep scattering with the H1 detector at HERA. Such a resonance could be a strange pentaquark Θ+, evidence for which has been reported by several experiments. The Ks0 p and Ks0 over(p, ̄) invariant mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on σ (e p → e Θ+ X) × BR (Θ+ → K0 p) are obtained at the 95% confidence level. © 2006.